Hint

Answer

DNA
DNA is short for deoxyribonucleic acid. DNA is in every living thing, but its pattern is never exactly identical in anyone, even twins. Normally, DNA is coiled up inside chromosomes; however, if you were to stretch out a single strand, it would be between 2-3 meters (6-9 feet) long! Scientists believe that many diseases occur because of imperfections in DNA. If DNA were to be completely understood, we might be able to cure lots of diseases, and we would understand our bodies far better.
DNA is the blueprint to all life. It controls our hair and eye color and literally every feature of our bodies, both physical and genetic.
The title may have been the biggest clue; DNA is double-stranded and resembles a twisted ladder.Hide